Hi TrygveHe,
So you are not a beginner
I think you can use my tutorials (see 'Documentation', Ben's videos).
In this videos I speak French but the graphics and texts are in English so I suppose you can follow this without difficulties.
What do you plan to use for I/O system?
In my opinion Modbus devices are more easy to program vs Arduino.
But a lot of people use Arduino with Proview.
For your project, with this process design (sensors, actuators) you can use 1 computer for all functions: development, operator and process station.
If you want to historize a variables you can also install MySql in this computer.
Proview do not require a high performance computer for few inputs/outputs. You can use a standard desktop or workstation (e.g. CoreDuo, 4Go ram).
For a basic control project (like a micro brewery), Proview provide all functions you need: grafcet programming, PID controlers, graphic symbols for HMI.
Good learning!
/Ben